Internal-combustion engine



Jan 6, 1931.

R. 'wEHR INTERNAL COMBUSTION ENGINE Filed Sept. 4, 1929 2 Sheets-Sheet l 38 3a aa la 0 as 0/2 a j Jan 6, 1931. R. \QNEHR 1,787,649

INTERNAL COMBUSTION ENGINE Filed Sept. 4, 1929 2 Sheets-Sheet 2 3 a r w 24 5 38 a 5a /0 5a dgaa 4O N E 6 J:

Patented Jan. 6, 1931 it V I I it p i UNITED STATES PATENT OFFICE RUDOLPH WE B, or nos ANGELEs, CA IFORNIA, assisiion T 'riin W BB, Moron oom- I PANY, Aoonronerrlon 0F GALIFORNIA' i I I m'rnannnoomausm on nema 7 Application filed September a, 'ieesQseriai No. .390, 284.' i i My invention relates to packing devices or eiiectively prevent leakage about said shoe, bearing devices for moving parts, and more The. above, and further objects and ad particularly to dev1ces for packing the rovantages of my invention, as will hereinafter tary valves of internal combustion engines morefully appeanlattain by the construc- 5 and insuring that said valves will at all tion described in the"s'pecification and illus- 50 times be effectively packed to prevent leaktrated in preferred form on the drawings,

ageunder all conditions of operation, and forming a part of my application.

at all temperatures" to Which said valves are Reference is 7 had to the I accompanying subjected. V, v drawings,in which similar reference char- 10 It accordinglyisan object of my invenacters denote similar parts. In the draw- 55 tion to provide a novel form of packing or ings, t j f v bearing device, inherently flexible or resili- Fig. l is a fragmentary cross-sectional ent in nature, which device is capable of view: of one form of my -invention,;illusmovement, responsive to the varying temtrating the parts beforethe, valve is .posi- 5 perature conditions ofa. rotary member with tioned therein, 1 j which said device is adapted to be associated. Fig. 2 is a. similar view. illustrating the A further object of my invention is to position the parts assume when the valve is ,rovide a novel form of packing shoe, in position, v 1 adapted for special use in connection with Fig. 3 is a transverse cross-sectional view the rotary valves of internal combustion enthrough the liner and packingshoe, show- 65 gines, said shoe being eccentrically posiing the position before they are placed in tioned with respect to the valve casing, prior the valve casing, I i H to the positioning of the valve therein, but Fig. 4 is" an enlarged perspective view of after said valve has been inserted within thepacking shoe,

g said casing, .said shoe will atall times em- Fig. 5 s an elevational view of the com- 7 brace said valve and have certain portions bined packing sleeve andicarbon removing thereof concentric with said Valve, thus conmember, J tinually afiording arunning tight fit with 'Fig. 6 is a fragmentary, top planv view said valve'to prevent leakage, the inherent of Fig. 5,'and v 1 r V resiliency or flexibility of said shoe always Fig- 7 is across-sectional view'of a modiautomatically adjusting said shoe to the rafied iormof shoe and sleeve. dius of said valve. Describing my invention more in detail, It is also an object of my invention to in its broader aspects, said invention comprovide a novel form of combined leakage prises a bearing member or packing shoe,

' preventing and carbon removing device, adapted for special usein connection with preferably in the shape of a sleeve, relainternal combustion engines, said member or tively movable with respect to the packing shoe having an inherent flexibility, or resilishoe, "or secured to said shoe and relatively ency, and when associated with the valve I movable with respect to the cylinder port casing'of a rotary valve is eccentrically posi- 40 of the engine, said member or sleeve having tioned With re'spect to theaperture therein,

a'cutting edge whereby, during any rela the valve, when positioned within the castive movement of said shoe and sleeve any ing, being'adapted to'bear on said member or accumulated carbon may be efiectively reshoe, so certain portions thereof will be con- 'moved, said sleeve. being adapted to form the centric with said valve to form a'bearing sur- 45 compression chamber ofthe engine, and also face therefor, and atflall times to maintain a running tight fit therewith, to prevent lea-kv such a fit, irrespective of wear or time changes of the valve.

age, the inherent resiliency or flexibility of said member or shoe continually maintainlng Said member or shoe is preferably used with a sectional or cutaway liner, embracing the valve within the valve casing, said memher, or shoe being capable of a radial move ment Within the cut-away portion of said liner, although itis to be distinctly under- .stood that-,"if desired, said liner may be omitted.

119 form thecompression chamber of the motor, to prevent leakageaboutthe shoe, and to cut off or remove any accumulations of carbon, I provide a sleeve, preferably formed with an upper cutting edge, to cutthe carbon,

said shoebeing preferably relatively movable with respectto said sleeve although said, shoe and sleeve maybe secured. to each other and move relatively with respect to theicylinder portof theengine. a

More specificially, my invention comprises an internal combustion engine 2, eitherof the two-cycle or four-cycle, .or any other type, the

cylinders 4 of which are provided with the usual spark plug openings 6, and the cylinder port -8,Iin which the compression chamber member or sleeve 10' is preferably anchored by any desired means as, for. example, the screw bolts 12. I 7 V The valve casing 14 is-provided with the usual inlet port 16 and exhaust port 18, and cooling channels 20 connected to theeylinder cooling channels 22, and positioned within said valve casing, and concentric therewith, is the sectional or cut-away liner 24, having inlet, apertures'26, and exhaust" apertures 28,

said liner being out out or cut away as at packing shoe 32, which, shoe fits loosely with- 7 in said cut-away portion so said shoe may have a movement there n.

The bearing deviceor shoe 32 is arcuate in form, and has its inner surface struck radially froma suitable point such as 79..(Figs. 1 and'2), the oute'r'periphery of theli'ner 24 being struokwith the same radius, but from the point 79'. thus positioning saidshoe eccentrically with respect to said liner, said shoe being positioned substantially as shown in .F ig. 1,,prior to the insertion of the valve 34 there- 1nv The shoe 32 may be vconstructedof suitable material, either, the same as that of the valve 34, or of diflerent'material, asin practice preferred, but must have an inherent resiliency. or flexibility, so that it will expand and contract and move radially withthe valve 34 to maintain at all times a running fit with said valve, which valve, when positioned within theliner 24, will cause'said shoe to have partso'f its inner.surface-concentric with tempera- 'vided; with the carbon cutting the outer periphery of said valve for said purpose, to eilectively prevent leakage.

. The shoe 32 is provided with ribs or enlargements 36, which ribs, when the shoe is in the position depicted in Fig. 1, will rest on the valve casing, and, as shown in F ig. 2, when the valve 34 is positioned within the liner 24, said ribs will also rest on said valve casing, forming resting points so that the intermediate parts of said shoe may by reason of its inherent flexibility or'resiliency move with the valve 34 as it expands, contracts or wears, to pack said valve, the outer end portions of said shoe having a slight clearance (Fig. 2.) between-said valve, there being thus always maintained ,a' running tight fit be- .tween'theva'lve and shoe from the sleeve 10, outwardly, so that all wear and expansion and contraction ofthe valve 34 may be compensated for at all times.

he shoe 32 is also provided with an open.- ing or aperture 37,.in which the wall of the sleeve 10 ispositioned, and which provides for a relativemovement between the shoe 32 and said sleeve,said opening or aperture beingsurrounded by a boss 38', which boss is always free from the valve casing 14, although the ribs'or enlargements 36 are continually in contact with said casing when the valve 34 is positioned therein, so that the flexibility or resiliency of said shoe will continually, and under all running conditions of the engine, urge said shoe to said valve, providing an exceedingly simple, eifective and eflicient means for packing said valve against leakage, and compensating for wear and temperature changes of said valve.

If desired,' the sleeve 10 may be provided with a flange 40 whereby'it may be detachably' associated with thejcylinder port 8 of for the reception of the bearing member or th If-desired, the sleeve 10 maybe secured to or integrally associatedwith the shoe 32, so

boththe shoe andthe sleeve may move relatively to the cyli der port- 8. Such acoustru'ctio'n is shown in where the shoe 32 with ribs or enlargements 36 has secured to or integral. therewith the sleeve 10 pro.- means 42 which sleeve is surrounded by the boss 38 as in the other form of my invention.

Iii-operation, the liner 24 is placed in the valve casing 14, and the shoe 32 placed over the sleeve 10, which edge positioned at all times within the confinesozf the aperture 37 andnever projects beyond the inner surface of said shoe, the movement of said shoe being very slight. The various parts. will then heiposition'edas has its upper cutting valve.

abut against one side or in Fig. 1, illustrating the eccentricity of the shoe 32.

The valve 34 is then positioned within the liner 24. This depresses slightly the shoe 32, so thatthe parts in the region of the cyle inder port'8 (and sleeve 10) will be concentric with the valve 34,'the remaining parts of said shoe being eccentric to the end that a wear surface is provided, the shoe by its inherent flexibility or resiliency being continually urged toward the periphery of the valve 34, the boss 38 being at all times out of engagement with the valve casinm (See Fi 2.) This permits a running tight fit, and prevents leakage, notwithstanding the slight wear and temperature changes of the The sleeve 10, in which the explosive mixture is compressed, prevents any leakage around the shoe 32 below the bottom thereof.- As the shoe 32 moves toward and away from the valve 34,1the portion 42 outs any carbon that may be accumulated. 1

As seen in Figs. 1 and 2, the shoe 32is slightly smaller than the cut-out or gap in the liner 24, which by the rotation of the valve 34 in one or the other direction is caused to the other of the shoe and thus forms a leak-proof joint therebetween, without interfering with the action of the shoe, which as hereinbefore stated, due

to its inherent resiliency, remains in snug contact with the valve, regardless of its di-- ametrical variation.

It will thus be seen that I have provided a simple, inexpensive, and remarkably efiicient means for packing a rotary surface.

While I have thus described my invention with great particularity, it will be clear that the same may be modified throughout a wide range. I accordingly do not propose to be limited to the exact details of construction as shown and described, but reserve the right in practice to make'any and all modifications thereof that fall within the scope of the appended claims.

I claim as my invention:

1'. In combination, a casing having an aperture, ture, and a member having its major portion engaging with the periphery of said rotary member and adapted by its inherent flexibility to move radially therewith to maintain a running fit under varying temperature conditions of said rotary member. I r

2. In combination, a valve casing having an aperture, a rotary valve within said aperture, a portion of the peripheral wall of said aperture being cut away, and a member positioned within said cut away portion, said member having its major surface contacting the valve andby its inherent flexibility being movable radially with said valve and relatively to said casin 3. A valve casing having an aperture, a liner in said aperture, said liner having a a rotary member within said aperand move radially therewith, and at all times maintain a running fit-with said valve on both: sides of saidport. 5'. An internalcombustionengine having a port, a rotary valve, and an inherently flexible packing shoe positioned oversaid port and engaging said valve, said shoe being adapted to move radially with said valve upon a variation of temperaturechanges of said valve.

6. Any internal combustion engine having a port, an inherently flexible packing'shoe positioned over said port, and means associated with said port and saidshoe for cutting any carbon that may accumulate in said port.

7. .An internal combustion engine having a port, port, and a pair of inter-connected relatively movable members associated with said port adapted to respond to temperature changes in said valve. I t

8. An arcuate packing shoe adapted for special use in connection with the rotary valve of an internal combustion engine, said shoe having an opening therein, a boss surrounding said opening and a rib on each end of said shoe.

9. A valve casing having an aperture, a valve adapted to rotate therein, a liner between said valve and casing said liner having a detached inherently yielding portion freely supported at its ends by said casing.

10. In a device of the character disclosed,

a valve casing having a port therein, a liner gap in said liner and supported at itssides.

upon said casing so that a substantial portion thereof exerts a yielding pressure against said valve, said plate having centrally there of a port, and means extending into said port to prevent circumferential movement of said plate and to remove deposits of carbon.

11. In a device of the character disclosed, a valve casing having aport therein, a liner in said casing having a cut-out portion, a valve adapted to rotate in said liner, and a spring-member disposed in the cutout portion of said liner and'adapted to conform to said valve and any diametrical variation thereof, and move radially therewith said spring memvalve easing member a rotary valve for controlling said.

its

valve adapted to rotate in said liner, a 7 member disposed in the cut-out portion. of said liner with a slack fit. and having aradi-V her having a port registeringwith the port in said valve casing;

"12. In a device ofg the character disclosed,

a valve casing having; a; port therein, a liner 7 I in saicl casing having a cut-out portion, a

ally yielding contact with the valve throughout the major portion of its latitudinal extent, said 'member having a port registering With the port in said casing, and means associated with said spring member to prevent circumferential movement thereof.

Intestimony whereof I have signedmy name to this sepecification.

RUDOLPH WEHR.

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